Engineering blog

News, technical writeups, and announcements directly from the development team.

CheerpJ 4.0: WebAssembly JVM for the browser, now with Java 11 and JNI support

Alessandro Pignotti, Stefano De Rossi
April 23, 2025
Putting the Ghost in the Shell: integrating Claude Computer Use in WebVM

Alessandro Pignotti
March 17, 2025

CheerpJ 3.1: JVM in WebAssembly and our roadmap for modern Java in the browser

Alessandro Pignotti, Stefano De Rossi
February 5, 2025
CheerpX 1.0: High performance x86 virtualization in the browser via WebAssembly

Alessandro Pignotti
December 4, 2024
WebVM 2.0: A complete Linux Desktop Environment in the browser via WebAssembly

Alessandro Pignotti
November 13, 2024
Join the WebVM: The Hackathon! - A Global Hybrid Event for Developers!

Ana Gaby, Jules Saarikoski
October 2, 2024
WebAssembly Branch Hinting: From an idea to W3C standard

Yuri Iozzelli
July 16, 2024
Modernising Legacy C++ MFC Applications with Cheerp

Martin Nyaga Guest
June 25, 2024
C++ meets TypeScript: bidirectional type interoperability in the Cheerp compiler

Chen Steenvoorden
March 12, 2024
Adding AddressSanitizer support to the Cheerp WebAssembly compiler

Daan Meijer
February 13, 2024
CheerpJ 3.0 (old version) now available

Alessandro Pignotti
February 1, 2024
Reviving the Dragon Court browser RPG with CheerpJ

Clarky Lee Guest
December 14, 2023
Deep dive into CheerpJ 3.0

Alessandro Pignotti, Alex Bates, Stefano De Rossi
November 30, 2023
CheerpJ 3.0rc2 now available

Alex Bates
November 29, 2023
CheerpJ 3.0rc1 now available

Alex Bates, Alessandro Pignotti
October 18, 2023
Watch the CheerpJ 3.0 AMA

Alex Bates, Alessandro Pignotti
September 5, 2023
Beyond the DevTools: Profiling WebApps at the Assembly Level

Elisabeth Panholzer
June 28, 2023
Mini.WebVM: Your own Linux box from Dockerfile, virtualized in the browser via WebAssembly

Alessandro Pignotti
May 22, 2023
Announcing CheerpJ 3.0

Alessandro Pignotti
May 9, 2023
Unexpectedly Useful: A Real World Use Case For WebAssembly System Interface (WASI)

Yuri Iozzelli, Alessandro Pignotti
April 6, 2023
Cheerp 3.0: The most advanced C++ compiler for the Web, now permissively licensed

Alessandro Pignotti
March 14, 2023
How we added full networking to WebVM via Tailscale

Yuri Iozzelli
October 5, 2022
PythonFiddle: Fully private client-side sample code execution and sharing

Jules Saarikoski
September 14, 2022
Fantastic tail calls, and how to implement them

Tom Olivier Tartarin
July 11, 2022
CheerpJ 2.3 Released

Lorenzo Marsicano
May 3, 2022
PartialExecuter: Reducing WebAssembly size by exploring all executions in LLVM

Carlo Piovesan
March 10, 2022
WebVM: server-less x86 virtual machines in the browser

Alessandro Pignotti
February 1, 2022
The Bottomless Pit of Disappointment: A Chrome Extension Tale

Alessandro Pignotti
August 10, 2021
A JavaScript Optimising Compiler

Carlo Piovesan
May 12, 2021
Announcing CheerpX for Flash, a solution to extend the life of Flash applications post-2020

Stefano De Rossi
September 21, 2020
Extreme WebAssembly 2: the sad state of WebAssembly tail calls

Alessandro Pignotti
August 18, 2020
How Cheerp supports 64-bit integers in both JavaScript and WebAssembly

Yuri Iozzelli
July 13, 2020
JSExport: C++ in the browser made easy

Carlo Piovesan
June 30, 2020
Extreme WebAssembly 1: pushing browsers to their absolute limits

Alessandro Pignotti
June 16, 2020
Adding anyref support in a C++ to WebAssembly compiler

Yuri Iozzelli
May 19, 2020
Solving the structured control flow problem once and for all

Yuri Iozzelli
April 11, 2019